This fast-casual chain has big expansion plans.Chipotle Mexican Grill (CMG 2.80%) shares, which soared to highs beyond 3,000inrecenttimes,todaystarttradingatanew,moreappetizingprice.Thecompanyhascompletedits50−for−1stocksplit,oneofthebiggestinNewYorkStockExchangehistoryandafirst−eversplitforthefast−casualrestaurantchain.Asaresult,thestock,consideringthelastclosingprice,issettotradeataroundlevelsof63 right now.This follows years of revenue growth fo ...